The final work is based on an explanation of the territorial organization, namely the approximation of the concepts of local and regional self-government in the Republic of Croatia, referring to historical development, normative sources, and municipalities, towns and counties as self-governing units. An example of public administration in France was also used as the main comparison, as it represents the public administration cradle and as such is an ideal candidate. By comparing the two systems, it was impossible to ignore the European Union and European administrative space and their impact on the development and on changes that have occurred or that just have to happen.